JP2004145981A - Disk loading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain high grade tray loading/unloading operation by suppressing occurrence of vibrational rocking operation of a tray 12 at immediately after start of loading operation of the tray 12 or immediately before finish of unloading operation. <P>SOLUTION: A guide groove 12a is provided at a tray 12 in parallel to a loading/unloading direction, groove width size of the guide groove 12a is made narrow at only near a tray loading start position, and gaps for guides 11a, 11b, 11c provided at a main chassis 11 engaged with it are reduced. Also, side pressure is given to a side wall of the guide groove 12a by an elastic body 11, and the guide groove 12a and the guides 11a, 11b, 11c are pressed and contacted during loading/unloading operation of the tray, immediately after start of loading operation of the tray, or immediately before finish of unloading operation. Occurrence of vibrational rocking operation at immediately after start of loading or immediately before finish of unloading of the tray 12 in a conventional disk loading device is suppressed by forming width of the guide 12a near the loading start position of the tray 12 is made narrower than the other parts, and a disk loading device having high operation grade can be obtained. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disc loading device suitable for use in, for example, a compact disc player.
[0002]
[Prior art]
As shown in FIG. 7, the conventional disk loading device has a rack 12b and a rotating gear 13 provided on the side of the device. The tray 12 is rotationally displaced by a moment about the center of gravity of the tray 12 generated because the position of the point of action of the force drawn into the disc 11 does not coincide with the center of gravity of the tray 12 substantially at the center of the disk mounting surface. Therefore, immediately after the tray storage from the tray discharge state in FIG. 8 to the tray storage state in FIG. 9 starts, or immediately before the tray discharge from the tray storage state in FIG. 9 to the tray discharge state in FIG. Oscillating movement of the tray 12 occurred, and rattling noise occurred.
[0003]
The amount of displacement of the swinging operation is maximum at the leading end of the tray 12 in the discharge direction, and the amount of displacement is set in order to avoid a state in which the guide groove 12a is fitted into the guides (11a, 11b, 11c) by press fitting and sliding. It is defined by the size of the gap provided between the guide groove 12a and the guide (11a, 11b, 11c).
[0004]
The displacement at the distal end portion is precisely the distance between the first guide 11a and the second guide 11b provided on the main chassis 11, in addition to the guide groove 12a and the guides (11a, 11b, 11c). 12 or the guide groove 12a, it depends substantially on the depth dimension. However, since the depth of the apparatus is limited and the discharge amount of the tray 12 requires a stroke larger than the diameter of the disk, there is a substantial freedom in design. The degree is extremely small. Therefore, it can be said that the displacement of the leading end of the tray 12 in the discharge direction during the swinging operation depends on the width of the guide groove 12a and the gap between the first guide 11a and the second guide 11b.
[0005]
In general, since the linearity of the guide groove 12a in the storing / discharging direction is 0.2 mm, a state in which the guide groove 12a and the guides (11a, 11b, 11c) are fitted and slid into the press fit during the storing / discharging is avoided. In this case, the gap between the guide groove 12 and each guide (11a, 11b, 11c) on the main chassis 11 needs to be about 0.25 mm to 0.35 mm.
[0006]
As a general design value, for example, the distance between the first guide 11a and the second guide 11b is 35 mm, and the distance from the position where the rotating gear 13 drives the rack 12b in the tray discharge state to the distal end of the tray 12 in the discharge direction is set. In the case of 175 mm, the amount of displacement at the tip of the tray 12 in the discharge direction during the swinging operation is about five times the gap between the guide groove 12a and each of the guides (11a, 11b, 11c). Is about 1.25 mm, and the gap is about 2.00 mm when the gap is 0.4 mm.
[0007]
[Patent Document 1]
JP-A-5-266563 (pages 2 to 5, FIG. 11)
[0008]
[Problems to be solved by the invention]
The vibrating swinging operation immediately after the start of the tray storage and immediately before the completion of the tray discharge significantly lowers the operation quality. However, if the displacement of the leading end in the tray discharge direction can be suppressed to about 1 mm or less, there is no problem in the operation quality. Therefore, if the gap between the guide groove 12a and the guides (11a, 11b, 11c) on the main chassis 11 can be controlled to 0.2 mm or less, the operation quality does not matter much even if the swing operation occurs. However, in the conventional disk loading device, since the linearity accuracy of the guide groove 12a provided in the tray 12 is about 0.2 mm, the guide grooves 12 and the guides (11a, 11b, 11c) on the main chassis 11 are used. Could not be set to 0.2 mm or less. If the gap is smaller than 0.2 mm, when the guide groove 12a is guided by the guides (11a, 11b, 11c) on the main chassis, the guide groove 12a is fitted and slid in the press fit, and the tray 12 is moved due to an increase in the operation load. This causes a problem that the operation speed is significantly lowered, or that the tray 12 cannot be driven by a motor (not shown).
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In order to suppress the vibrational swinging operation of the tray 12 to such an extent that the operation quality does not become a problem, the guide groove 12a and the main chassis 11 are provided. Even if the gaps between the guides (11a, 11b, 11c) are set to 0.2 mm or less, a disk loading device which does not cause a problem such as extremely low speed or inability to operate, and a guide groove 12a and the main chassis 11 It is an object of the present invention to provide a disk loading device capable of suppressing the oscillating swinging operation of the tray 12 without depending on gaps between the guides (11a, 11b, 11c).
[0010]
[Means for Solving the Problems]
In the disc loading device according to the present invention, the width of the guide groove provided in the main chassis or the tray in parallel with the storing / discharging direction to be engaged with the guide provided on the tray or the main chassis is set to the storage start position of the tray. In the vicinity (the same as the vicinity of the discharge completion position; the same applies hereinafter), it is formed narrower than the width of other portions.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 shows a disk loading device according to Embodiment 1 of the present invention, and is a cross-sectional view when a guide groove 12a near a storage start position of a tray 12 is viewed from below a main chassis 11. FIG. The tray 12 on which the disc is placed and provided with the guide groove 12a parallel to the storage / discharge direction is stored / discharged to / from the main chassis 11 provided with the guides 11a and 11b engaged with the guide groove.
[0012]
The guide groove 12a has a section A having a narrow width near the storage start position of the tray 12. In the section A, the gap between the guide groove 12a and the guides (11a, 11b, 11c) is configured to be 0.1 mm to 0.2 mm. The gap between the guide groove 12a and the guide (11a, 11b, 11c) in the section A is determined by the linearity of the guide groove 12a, and the linearity is proportional to its length. In the case of Embodiment 1, since the total length of the guide groove is 200 mm, if the length of the section A is set to about 45 mm, an accuracy of about 0.05 mm can be easily obtained, and the configuration with the above gap is It becomes possible. Note that the width of the guide groove 12a in a portion other than the section A is formed so that the gap between the guides (11a, 11b, 11c) is 0.25 mm to 0.35 mm. After the above guides (11a, 11b, 11c) have passed, the clearance between the guides (11a, 11b, 11c) and the guide groove 12a does not decrease or the load does not increase due to tightening. Done.
[0013]
The storage of the tray 12 in the disk loading device configured as described above is started by rotating the rotating gear 13 by a motor (not shown) from the state of FIG. When the storage is started, the torque of the motor is transmitted from the rotationally driven rotary gear 13 to the rack 12b, and the rotational motion of the rotary gear 13 is converted into linear motion by the rack 12b. As a result, the tray 12 is housed in the main chassis 11 by the guide grooves 12a being guided by the guides (11a, 11b, 11c), and finally reaches the housed state shown in FIG.
[0014]
When the tray 12 is stored in the main chassis 11, the disk is held by the clamper 18 and a turntable (not shown) shown in FIG. 9, and the tray storage is completed.
[0015]
The storage of the tray 12 is performed as described above, but immediately after the start, as in the conventional disk loading device, the position of the center of gravity of the tray 12 and the point of application of the force by which the rotating gear 13 drives the rack 12b are shifted. The resulting moment about the center of gravity of the tray causes an oscillating swinging action to occur temporarily. However, since the gap between the guide groove 12a and the guides (11a, 11b, 11c) is 0.2 mm at the maximum in the swinging operation, the displacement at the tip of the tray 12 in the discharge direction is 1 mm at the maximum. High-quality tray storage is performed, and generation of abnormal noise can be suppressed.
[0016]
By suppressing the swinging operation, the relative movement between the tray 12 and the disk placed on the tray 12 is also suppressed. Therefore, it is possible to prevent the disk recording surface from being damaged due to the relative movement between the disk recording surface and the tray mounting surface. In addition, when the disc is held, the difference between the center of the disc and the center of the disc holding unit including the turntable (not shown) and the clamper 18 is reduced, and the disc can be held smoothly.
[0017]
On the other hand, the discharge of the tray 12 is also started by rotating the rotating gear 13 by a motor (not shown), and the discharge of the tray 12 is also seen immediately before the discharge of the tray 12 is completed and immediately after the tray 12 is stored. A rocking motion similarly occurs. However, also in this case, similarly to the storage of the tray 12, the displacement at the leading end position of the tray 12 in the discharge direction becomes 1 mm at the maximum, and the high-quality tray 12 is discharged.
[0018]
In addition, at the start of storage or at the time of completion of discharge, at least two guides are engaged with the portion where the width of the guide groove is formed to be narrow, so that the parallel state between the storage / discharge direction and the guide groove is more reliably maintained. Thus, a higher quality tray discharging operation can be obtained.
[0019]
Embodiment 2 FIG.
2 to 4 are views showing a second embodiment of the present invention. FIG. 2 is an exploded view of a disk loading device according to a second embodiment of the present invention, and FIG. 3 is a disk according to the second embodiment of the present invention. FIG. 4 is a cross-sectional view of the guide groove 12a of the disc loading device according to the second embodiment of the present invention when the tray is in a discharged state, as viewed from below the main chassis 11. FIG.
[0020]
The structure of the second embodiment is almost the same as that of the first embodiment, but the guide grooves are so small that the gap between the guide grooves 12a and the guides (11a, 11b, 11c) can be prevented from being fitted and slid. The gap is provided so as to be constant, for example, 0.25 mm to 0.35 mm over the entire length of the tray 12 a, and one of the side walls of the guide groove 12 a and the guide when storing and discharging the tray 12. (11a, 11b, 11c) is different from the main chassis 11 in that an elastic body 11d, for example, a leaf spring, which presses the elastic body 11d in the X direction in the drawing or in the opposite direction thereto, is provided integrally with the main chassis 11.
[0021]
The storing / discharging operation of the tray 12 is performed in the same manner as in the first embodiment, and the oscillating swinging operation immediately after the storing of the tray 12 is started or immediately before the discharging is completed also occurs. However, since the side wall of the guide groove 12a is pressed against the guides (11a, 11b, 11c) by the elastic body 11d, the swing operation is suppressed, and the storage and storage of the high-quality tray 12 is performed as in the first embodiment. An ejection operation is performed.
[0022]
Embodiment 3 FIG.
FIG. 5 shows a disk loading device according to Embodiment 3 of the present invention, and is a cross-sectional view when the guide groove 12a of the disk loading device in a tray discharge state is viewed from below the main chassis 11. As shown in FIG.
[0023]
The third embodiment is an extension of the second embodiment, and has substantially the same configuration. However, the guide groove 12a on the side to which the side pressure is applied by the elastic body 11d near the storage start position of the tray 12 is used. Is different in that a step is provided on the side wall.
[0024]
The storing and discharging of the tray 12 is performed in the same manner as in the second embodiment, and the vibrational swinging operation immediately after the storing of the tray 12 is started or immediately before the discharging is completed also occurs. However, since the side wall of the guide groove 12a is pressed against the guides (11a, 11b, 11c) by the elastic body 11d, the swinging operation is suppressed, and the high-quality tray 12 is stored and stored as in the first embodiment. An ejection operation is performed.
[0025]
Further, a step is provided on the side wall of the guide groove 12a on the side where the lateral pressure is applied by the elastic body 11d near the storage start position of the tray 12. Therefore, the displacement of the elastic body 11d in the vicinity of the storage start position is larger than the displacement in other portions. Thus, the lateral pressure can be effectively applied to the side wall of the guide groove 12a only near the storage start position of the tray 12. Therefore, the driving force required for storing and discharging the tray 12 can be made smaller in the entire operation than in the second embodiment. That is, when the motor is driven at a constant voltage, the tray 12 can be stored and ejected with a light load, and the operating speed of the tray 12 does not extremely decrease. Further, the wear of the press contact portion between the side wall of the guide groove 12a and the elastic body 11d due to the repeated storage and discharge of the tray 12 can be reduced. The change in lateral pressure is gentle, and the high-quality tray 12 can be stored and discharged for a long time. Such an effect becomes larger as the displacement of the elastic body 11d near the storage start position of the tray 12 approaches zero.
[0026]
When a plurality of the guides (11a, 11b, 11c) are provided near the storage start position of the tray 12 as in the second and third embodiments, the guides (11a, 11a, 11b, 11c), the side wall of the guide groove 12a is pressed against the side surface of the adjacent guide (11a, 11b, 11c) in the same direction, so that the main chassis 11 and the tray 12 are parallel to each other. Since the tray 12 is stored and discharged while being maintained, higher-quality storing and discharging operations can be obtained. When a plurality of the elastic members are provided near the storage start position of the tray 12, the same effect can be obtained by providing the guides (11a, 11b, 11c) between the adjacent elastic members. .
[0027]
Embodiment 4 FIG.
FIG. 6 is a view showing the fourth embodiment of the present invention, and is a cross-sectional view when the guide groove 12a of the disc loading device in the tray discharge state is viewed from below the main chassis 11. FIG.
The side pressure wall 12c is provided in parallel with the storage / discharge direction, and the tray 12 on which the disk is placed is stored / discharged in the main chassis 11 provided with the guide wall 11e in parallel with the side pressure wall 12c. The side pressure wall 12c and the guide wall 11e are pressed against each other by the elastic body 11d provided on the main chassis 11 when the tray 12 is stored and discharged.
[0028]
The guide wall 11e may not be provided continuously and in parallel with the side pressure wall 12c as shown in FIG. 6, and may be, for example, interspersed with the elastic body 11d.
[0029]
The storage and discharge of the tray 12 is performed in the same manner as in the first embodiment, and the side pressure wall 12c provided on the tray 12 is guided by the guide wall 11e provided in parallel with the tray 12 so that the tray 12 is mounted on the main chassis. 11 and finally reaches the storage state shown in FIG. Also in the fourth embodiment, a vibrational swinging operation immediately after the storage of the tray 112 is started or immediately before the discharge is completed occurs as in the first embodiment. However, since the side pressure wall 12c is pressed against the guide wall 11e by the elastic body 11d, the swinging operation is suppressed, and the storing / discharging operation of the high-quality tray 12 is performed.
[0030]
By providing at least two elastic bodies 11d in the vicinity of the storage start position, the parallel state of the guide wall 11e and the side pressure wall 12c is maintained during storage and discharge of the tray 12, so that a higher-quality tray storage is possible. -A discharge operation can be obtained.
[0031]
Further, a step is provided in the guide wall 11e, and the side pressure applied to the other portion is less than the side pressure applied to the guide wall 11e in the vicinity of the storage start position so as not to affect the storage / discharge operation of the tray 12. By reducing the size of the tray 12, a high-quality storing and discharging operation of the tray 12 for a long time can be obtained as in the third embodiment.
[0032]
The guide groove 12a and the guides (11a, 11b, 11c) in the first, second, and third embodiments, and the guide wall 11e and the side pressure wall 12c in the fourth embodiment are provided on either the tray 12 or the main chassis 11. You may.
The same applies to the elastic body 11d in the second, third and fourth embodiments.
[0033]
The elastic body 11d is not limited to a leaf spring, but may be any material such as rubber, helical spring, or the like that can apply an appropriate lateral pressure to the side wall or the side pressure wall 12c of the guide groove 12a.
[0034]
Further, the elastic body 11d may be formed separately from the main chassis 11 or the tray 12 if necessary. However, by forming the elastic body 11d integrally with the main chassis 11 or the tray 12 as in the second to fourth embodiments. Thus, a disk loading device having a high operation quality can be obtained without adding new parts to the conventional disk loading device.
[0035]
【The invention's effect】
As described above according to the present invention, by forming the width of the guide groove in the vicinity of the tray storage start position narrower than the width of the other portions, the width of the guide groove occurs immediately after the tray is stored or immediately before the discharge is completed in the conventional disk loading device. A high-quality disc loading device can be obtained by suppressing the occurrence of an oscillating swinging motion.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a guide groove of a disc loading device according to a first embodiment of the present invention in a tray discharge state when viewed from below a main chassis.
FIG. 2 is an exploded view of a disk loading device according to a second embodiment of the present invention.
FIG. 3 is a perspective view of a main part of a disc loading device according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a guide groove in a tray ejection state of the disc loading device according to Embodiment 2 of the present invention when viewed from below a main chassis.
FIG. 5 is a cross-sectional view of a guide groove in a tray ejection state of the disc loading device according to Embodiment 3 of the present invention when viewed from below a main chassis.
FIG. 6 is a cross-sectional view of a guide groove of a disc loading device according to a fourth embodiment of the present invention in a tray ejection state when viewed from below a main chassis.
FIG. 7 is an exploded view showing a conventional disk loading device.
FIG. 8 is a perspective view of a conventional optical disc device showing a tray ejection state.
FIG. 9 is a perspective view of a conventional optical disk device showing a state in which a tray is stored.
[Explanation of symbols]
1. Optical disk device 11. Main chassis 11a. First guide 11b. Second guide 11c. Third guide 11d. Elastic body 11e. Guide wall 12. Tray 12a. Guide groove 12b. Rack 12c. Side wall 13. Rotating gear 18. Clamper 57. Optical pickup

Claims (10)

A tray on which a disc is placed, a main chassis in which the tray is stored and ejected, a guide groove provided in the main chassis or the tray in a direction parallel to the direction of storage and ejection, and a tray provided in the tray or the main chassis. And a guide engaged with the guide groove, wherein the width of the guide groove near the storage start position of the tray is smaller than the width of other portions. 2. The disk according to claim 1, wherein a gap between a side wall of the guide groove and a guide engaged with the side wall in a portion where the width of the guide groove is formed is 0.1 mm to 0.2 mm. Loading device. 3. The disk loading device according to claim 1, wherein at the time of starting the storage of the tray, at least two guides engage with side walls of a portion where the width of the guide groove is formed to be small. A tray on which a disc is placed, a main chassis in which the tray is stored and ejected, a guide groove provided in the main chassis or the tray in a direction parallel to the direction of storage and ejection, and a tray provided in the tray or the main chassis. A disc loading device comprising: a guide engaged with the guide groove; and an elastic body that presses the guide against the side wall of the guide groove during the operation of storing and discharging the tray. 5. The disk loading device according to claim 4, wherein, during the operation of storing and discharging the tray, the amount of displacement of the elastic body near the storage start position of the tray is larger than the amount of displacement at other portions. . The disk loading device according to claim 4, wherein a plurality of the guides are provided near a storage start position of the tray, and the elastic body is provided between adjacent guides. The disk loading device according to claim 4, wherein a plurality of the elastic bodies are provided near a storage start position of the tray, and the guide is provided between adjacent elastic bodies. A tray on which a disc is placed, a main chassis in which the tray is stored and ejected, a guide wall provided in the main chassis or the tray in a direction parallel to the direction of storage and ejection, and a guide in the tray or the main chassis. A disc loading device, comprising: a side pressure wall provided in parallel with a wall; and an elastic body that presses the guide wall and the side pressure wall during storage / discharge operation of the tray. 9. The disk loading device according to claim 8, wherein at least two elastic members are provided near a storage start position of the tray. 10. The disk loading device according to claim 4, wherein the elastic body is provided integrally with the main chassis or the tray.

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